123307542540 has 1080 divisors, whose sum is σ = 512980210512. Its totient is φ = 24572782080.

The previous prime is 123307542529. The next prime is 123307542577. The reversal of 123307542540 is 45245703321.

123307542540 is a `hidden beast` number, since 1 + 2 + 3 + 3 + 0 + 75 + 42 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 123307542495 and 123307542504.

It is an unprimeable number.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 372530175 + ... + 372530505.

Almost surely, 2^123307542540 is an apocalyptic number.

123307542540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123307542540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256490105256).

123307542540 is an abundant number, since it is smaller than the sum of its proper divisors (389672667972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123307542540 is a wasteful number, since it uses less digits than its factorization.

123307542540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The spelling of 123307542540 in words is "one hundred twenty-three billion, three hundred seven million, five hundred forty-two thousand, five hundred forty".